package com.ciwong.mobilelib.utils;

import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Rect;
import android.util.Log;
import android.view.View;

import com.ciwong.libs.utils.CWLog;


/**
 * 生成模糊图片类
 */
public class Blur
{

    private static final String TAG = "Blur";

    @SuppressLint("NewApi")
    public static Bitmap fastblur(Context context, Bitmap sentBitmap, int radius)
    {
        if (sentBitmap == null || sentBitmap.getConfig() == null || sentBitmap.isRecycled())
        {
            return null;
        }
//        int width = sentBitmap.getWidth();
//        int height = sentBitmap.getHeight();
//        sentBitmap = Bitmap.createBitmap(sentBitmap, 0, height * 2 / 5, width,
//                height * 2 / 5);

        /*
         * if (VERSION.SDK_INT > 16) { Bitmap bitmap =
         * sentBitmap.copy(sentBitmap.getConfig(), true);
         *
         * final RenderScript rs = RenderScript.create(context); final
         * Allocation input = Allocation.createFromBitmap(rs, sentBitmap,
         * Allocation.MipmapControl.MIPMAP_NONE, Allocation.USAGE_SCRIPT); final
         * Allocation output = Allocation.createTyped(rs, input.getType());
         * final ScriptIntrinsicBlur script = ScriptIntrinsicBlur.create(rs,
         * Element.U8_4(rs)); script.setRadius(radius e.g. 3.f );
         * script.setInput(input); script.forEach(output);
         * output.copyTo(bitmap); return bitmap; }
         */

        // Stack Blur v1.0 from
        // http://www.quasimondo.com/StackBlurForCanvas/StackBlurDemo.html
        //
        // Java Author: Mario Klingemann <mario at quasimondo.com>
        // http://incubator.quasimondo.com
        // created Feburary 29, 2004
        // Android port : Yahel Bouaziz <yahel at kayenko.com>
        // http://www.kayenko.com
        // ported april 5th, 2012

        // This is a compromise between Gaussian Blur and Box blur
        // It creates much better looking blurs than Box Blur, but is
        // 7x faster than my Gaussian Blur implementation.
        //
        // I called it Stack Blur because this describes best how this
        // filter works internally: it creates a kind of moving stack
        // of colors whilst scanning through the image. Thereby it
        // just has to add one new block of color to the right side
        // of the stack and remove the leftmost color. The remaining
        // colors on the topmost layer of the stack are either added on
        // or reduced by one, depending on if they are on the right or
        // on the left side of the stack.
        //
        // If you are using this algorithm in your code please add
        // the following line:
        //
        // Stack Blur Algorithm by Mario Klingemann <mario@quasimondo.com>

        Bitmap bitmap = sentBitmap.copy(sentBitmap.getConfig(), true);

        if (radius < 1)
        {
            return (null);
        }

        int w = bitmap.getWidth();
        int h = bitmap.getHeight();

        int[] pix = new int[w * h];
        Log.e("pix", w + " " + h + " " + pix.length);
        bitmap.getPixels(pix, 0, w, 0, 0, w, h);

        int wm = w - 1;
        int hm = h - 1;
        int wh = w * h;
        int div = radius + radius + 1;

        int r[] = new int[wh];
        int g[] = new int[wh];
        int b[] = new int[wh];
        int rsum, gsum, bsum, x, y, i, p, yp, yi, yw;
        int vmin[] = new int[Math.max(w, h)];

        int divsum = (div + 1) >> 1;
        divsum *= divsum;
        int dv[] = new int[256 * divsum];
        for (i = 0; i < 256 * divsum; i++)
        {
            dv[i] = (i / divsum);
        }

        yw = yi = 0;

        int[][] stack = new int[div][3];
        int stackpointer;
        int stackstart;
        int[] sir;
        int rbs;
        int r1 = radius + 1;
        int routsum, goutsum, boutsum;
        int rinsum, ginsum, binsum;

        for (y = 0; y < h; y++)
        {
            rinsum = ginsum = binsum = routsum = goutsum = boutsum = rsum = gsum = bsum = 0;
            for (i = -radius; i <= radius; i++)
            {
                p = pix[yi + Math.min(wm, Math.max(i, 0))];
                sir = stack[i + radius];
                sir[0] = (p & 0xff0000) >> 16;
                sir[1] = (p & 0x00ff00) >> 8;
                sir[2] = (p & 0x0000ff);
                rbs = r1 - Math.abs(i);
                rsum += sir[0] * rbs;
                gsum += sir[1] * rbs;
                bsum += sir[2] * rbs;
                if (i > 0)
                {
                    rinsum += sir[0];
                    ginsum += sir[1];
                    binsum += sir[2];
                }
                else
                {
                    routsum += sir[0];
                    goutsum += sir[1];
                    boutsum += sir[2];
                }
            }
            stackpointer = radius;

            for (x = 0; x < w; x++)
            {

                r[yi] = dv[rsum];
                g[yi] = dv[gsum];
                b[yi] = dv[bsum];

                rsum -= routsum;
                gsum -= goutsum;
                bsum -= boutsum;

                stackstart = stackpointer - radius + div;
                sir = stack[stackstart % div];

                routsum -= sir[0];
                goutsum -= sir[1];
                boutsum -= sir[2];

                if (y == 0)
                {
                    vmin[x] = Math.min(x + radius + 1, wm);
                }
                p = pix[yw + vmin[x]];

                sir[0] = (p & 0xff0000) >> 16;
                sir[1] = (p & 0x00ff00) >> 8;
                sir[2] = (p & 0x0000ff);

                rinsum += sir[0];
                ginsum += sir[1];
                binsum += sir[2];

                rsum += rinsum;
                gsum += ginsum;
                bsum += binsum;

                stackpointer = (stackpointer + 1) % div;
                sir = stack[(stackpointer) % div];

                routsum += sir[0];
                goutsum += sir[1];
                boutsum += sir[2];

                rinsum -= sir[0];
                ginsum -= sir[1];
                binsum -= sir[2];

                yi++;
            }
            yw += w;
        }
        for (x = 0; x < w; x++)
        {
            rinsum = ginsum = binsum = routsum = goutsum = boutsum = rsum = gsum = bsum = 0;
            yp = -radius * w;
            for (i = -radius; i <= radius; i++)
            {
                yi = Math.max(0, yp) + x;

                sir = stack[i + radius];

                sir[0] = r[yi];
                sir[1] = g[yi];
                sir[2] = b[yi];

                rbs = r1 - Math.abs(i);

                rsum += r[yi] * rbs;
                gsum += g[yi] * rbs;
                bsum += b[yi] * rbs;

                if (i > 0)
                {
                    rinsum += sir[0];
                    ginsum += sir[1];
                    binsum += sir[2];
                }
                else
                {
                    routsum += sir[0];
                    goutsum += sir[1];
                    boutsum += sir[2];
                }

                if (i < hm)
                {
                    yp += w;
                }
            }
            yi = x;
            stackpointer = radius;
            for (y = 0; y < h; y++)
            {
                // Preserve alpha channel: ( 0xff000000 & pix[yi] )
                pix[yi] = (0xff000000 & pix[yi]) | (dv[rsum] << 16)
                        | (dv[gsum] << 8) | dv[bsum];

                rsum -= routsum;
                gsum -= goutsum;
                bsum -= boutsum;

                stackstart = stackpointer - radius + div;
                sir = stack[stackstart % div];

                routsum -= sir[0];
                goutsum -= sir[1];
                boutsum -= sir[2];

                if (x == 0)
                {
                    vmin[y] = Math.min(y + r1, hm) * w;
                }
                p = x + vmin[y];

                sir[0] = r[p];
                sir[1] = g[p];
                sir[2] = b[p];

                rinsum += sir[0];
                ginsum += sir[1];
                binsum += sir[2];

                rsum += rinsum;
                gsum += ginsum;
                bsum += binsum;

                stackpointer = (stackpointer + 1) % div;
                sir = stack[stackpointer];

                routsum += sir[0];
                goutsum += sir[1];
                boutsum += sir[2];

                rinsum -= sir[0];
                ginsum -= sir[1];
                binsum -= sir[2];

                yi += w;
            }
        }

        Log.e("pix", w + " " + h + " " + pix.length);
        bitmap.setPixels(pix, 0, w, 0, 0, w, h);
        return (bitmap);
    }

    public static Bitmap takeScreenShot(Activity activity, int top)
    {
        // View������Ҫ��ͼ��View
        View view = activity.getWindow().getDecorView();
        int width0 = view.getWidth();
        int height0 = view.getHeight();
        // CWLog.d("ljp", "width0 = " + width0 + " height0 = " + height0 +
        // " , getMeasuredWidth = " + view.getMeasuredWidth() +
        // " getMeasuredHeight = " + view.getMeasuredHeight());
        // view.measure(MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED),
        // MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
        // view.layout(0, 0, view.getMeasuredWidth(), view.getMeasuredHeight());
        // CWLog.d("ljp", "getMeasuredWidth = " + view.getMeasuredWidth() +
        // " getMeasuredHeight = " + view.getMeasuredHeight());
        view.setDrawingCacheEnabled(true);
        view.buildDrawingCache();
        Bitmap b1 = view.getDrawingCache();
        Bitmap b = null;
        if (b1 != null)
        {
            int width1 = b1.getWidth();
            int height1 = b1.getHeight();
            CWLog.d("ljp", "width1 = " + width1 + " height1 = " + height1);
            // ��ȡ״̬���߶�
            Rect frame = new Rect();
            activity.getWindow().getDecorView()
                    .getWindowVisibleDisplayFrame(frame);
            int statusBarHeight = frame.top;

            // ��ȡ��Ļ���͸�
            int width = activity.getWindowManager().getDefaultDisplay()
                    .getWidth();
            int height = activity.getWindowManager().getDefaultDisplay()
                    .getHeight();
            // ȥ��������
            // Bitmap b = Bitmap.createBitmap(b1, 0, 25, 320, 455);
            // b = Bitmap.createBitmap(b1, 0, statusBarHeight, width >
            // b1.getWidth() ? b1.getWidth() : width,
            // (height - statusBarHeight) > b1.getHeight() ? b1.getHeight() :
            // (height - statusBarHeight));
            // CWLog.d("ljp", "width = " + width + " height = " + height +
            // "width1 = " + width1 + " height1 = " + height1);
            b = Bitmap.createBitmap(b1, 0, top, width1, height1 - top);
            view.destroyDrawingCache();
        }

        return b;
    }

    public static Bitmap takeScreenShot(Activity activity)
    {
        // View������Ҫ��ͼ��View
        View view = activity.getWindow().getDecorView();
        view.setDrawingCacheEnabled(true);
        view.buildDrawingCache();
        Bitmap b1 = view.getDrawingCache();

        // ��ȡ״̬���߶�
        Rect frame = new Rect();
        activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(frame);
        int statusBarHeight = frame.top;

        // ��ȡ��Ļ���͸�
        int width = activity.getWindowManager().getDefaultDisplay().getWidth();
        int height = activity.getWindowManager().getDefaultDisplay()
                .getHeight();
        // ȥ��������
        // Bitmap b = Bitmap.createBitmap(b1, 0, 25, 320, 455);
        Bitmap b = Bitmap.createBitmap(b1, 0, statusBarHeight, width, height
                - statusBarHeight);
        view.destroyDrawingCache();
        return b;
    }

}
